Documents / Analysis
Special Report No. 14 was issued by the U.S. Air Force's Air Technical Intelligence Center on 5 May 1955. It is a statistical study of about 4,000 reports of unidentified aerial objects from June 1947 to December 1952. The reports were reduced to IBM punched cards and analyzed with methods including chi square tests. The report concludes that the reports it examined are very unlikely to represent technology beyond present scientific knowledge, and it notes that no case produced valid physical evidence.
“R.G.”3 pages
Evaluation e
0-Balloon
1 Mstmnomical
2-Aircrift
3-Light Ptienom.
4-Birds
S-Clouds, Dust, t i c
6-lnsuffic Into.
7-Psydo logical
8-Unknown
9-Othec
Total
r ...A
Number
Certain
0
A
_A\
&
0
0
0
_ ^
a
Doubtful
0
7
o
o
o
a
o
o
e
7
Total
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0
/
q
Certain
00
^V
1AL
0,0~
0.0
fl.0
0.0
£?£>
0O
/ , / • /
» Xfj
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Doubtful
ft?
0.0
£>.0
00
(IP
0.0
0.0
Total
00
0-0
rt.0
00
00
/M-
/ 0
e?s}7/07
/s.s
o S
Number
Certain
' ?.
/
0
0
a
Doubtful
X
a
&
C
o
0
/
Total
/
/
2,
0
0
0
0
4s
/O
Percent
Certain
£0.0
/0.0
/£JL
0.0
0.0
/0.0
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Doubtful
0.0
/0.0
0.0
0.0
&0
0.0
0.0
0,0
^0.0
Total
#00
/0-0
20.0
00
00
0.0
0.0
0.0
20 c
/00.
Evaluation
O-Balloon
1-Astranomical
2-Airciaft
3-Light Phenom.
4-Birds
5-Clouds, Dust, etc
frlnsuffic Info.
7-Psychological
8-UnknoMi
M t t i e i
Total
Number
Certain
J
6
0
a
0
4
a
3
Ooubtfu
1
1
0
0
0
0
0
0
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Total
if
0
0
J-
Per Cent
Certain
/I a
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Number
Certain
3
Jr
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0
a
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/
A
0
a
0
0
0
/
Total
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7
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fp
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0
/
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PerCent
Certain
6.0
0.0
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0.0
^0-
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£0
60.0
Doubtful
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/0.0
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/0.0
0.0
0-0
0.0
0.0
00
£0
40.0
Total
20.0
3£.O
/£0
/(XO
0.0
0.0
0.0
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Number
Certain
£>4.0/€S /?£'S0&7£js
£"0£. rf#j&SJ7'/0s1/ 0jc S/j: o/f /fire
Number
Certain
0
0
_ ^ _
0
\J^_
3/
Doubtfu
0
0
O
a
/
£0
Total
a
0
,7
0
2.
3
2,
£l
Percent
Certain
0.0
377
2-3
0.0
0,0
0.0
¥•?
Doubtfu
0 0
0.0
0.0
0.0
0.0
0.0
0.0
/•{,
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fs.t
33
0.0
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3.3
00
¥•9
3.2.
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{-SO •J&ts/Js
Number
Certain
/
J~
0
0
a
0
J.
0
Doubtful
0
f
O
0.
a
0
0
a
0
0
-7
Total
0
rf
0
0
0
2,
//
PerCent
Certain
?•/
97
^0.
_&£_
0.0
/ / 2
0.0
Doubtful
0.0
(,•?•(.
0.0
0,0
0.0
0.0
00
0-0
0,C
0-0
Total
0.0
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0.O
0.0
0.0
0.0
/£.2
0.0
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//-JO Sf/-0sS»^
Number
Certain
0
0
0
0
/
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a
/
/
0
a
a
0
0
&
a
2.
Total
0
7
0
0
f
0
Per Cent
Certain
0.0
0.0
0.0
J2*J2-
//. /
0.0
tLS.
Doubtful
0.0
/ / • /
t/-f
0.0
0.0
0.0
0.0
0.0
00
0O
12.Z
Total
0.0
/ / . /
0.0
0P
0.0
0.0
0 0
/ / • /
0.0
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£/-£.€> ^/CCrtSS'DX
Number
Certain
_ ^ _
/
0
0
0
a
a
/
Doubtful
a
0
0
0
0
a
a
a
0
0
0
Total
0
/
0
0
0
(
0
Per Cent
Certain
S0.0
0.0
0.0
0.0
&0.O
0.0
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Doubtful
0.0
00
0.0
0.0
^0-0
0.0
0-0
0.0
0.0
0.0
Total
00
0.0
0-0
(70
0.0
0.0
Sao
0J2-.
/oo.
Evaluation
O-Balloon
1-Astnjnomical
2-Aucratt
3-Light Phenom.
4-Biids
S-Clouds, Dust, etc
6-lnsuffic kilo.
7-Piydnlogiol
8-Unkno«n
S-Other
Total
Number
Certain
/
0
/
/
S
Doubtful
/
w
0
6
O
O
a
0
a
Total
/
/
,0
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/
0
a
/
9
Percent
Certain
/ / • /
G0
0J2_
£0-
IL-L
ya0
31.3
Doubtful
0.0
££.{.
0.0
0.0
00
00
0 0
0.0
H-7
Total
/ / . /
/ / • /
£&.£
0-0
0-0
00
//./
00
00
/ / • / •
/oo.
6-30 Aft/Sv rps
Number
Certain
/
/
2
Jf
Doubtful
0
J
0
0
O
0
O
0
a
Total
/
2.
0
0
0
0
2s
0
//
Per Cent
Certain
LL
/2.Z
7&.L
0.0
00
/£l
0-0
tf27_
Doubtful
0.0
27.3
'0.0
0.0
0 0
00
0-0
0-0
0.0
0-0
2f.3
Total
9-'
0.0
0,0
0O
/fZ
0 0
/00.
Oi/e/C Jo M,SSL/TG,
!>O£AT,C>*S AT. T ^T-ATt*
Number
Certain
0
/0
/
0
a
0
0
3
/
Doubtful
a
/4
/
a
a
0
0
. 0
0
/ j T
Total
0
*•¥
I
0
6
0
z
Percent
Certain
271
a.z
00
$ - • $
/Li
£3
.JU-
JU
Doubtful
0.0
J?.g
0.0
i o
4.0
0.0
0o
04
0o
471
Total
00
a.7
op
fl.O
0.0
7£,7
0-P
13
Z.tf
/a?.
230 Analysis, from the classic collection. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.